diff --git a/composer.json b/composer.json
index df9795438..f37f99aa6 100644
--- a/composer.json
+++ b/composer.json
@@ -249,6 +249,7 @@
     },
     "suggest": {
         "ext-gettext": "Used for gettext translation filter",
+        "ext-intl": "Used for Tstamp task",
         "ext-posix": "Used for Posix selector and ACLs",
         "ext-sockets": "Used for the Socket condition",
         "ext-tidy": "Used for the Tidy filter",